JP7579764B2 - Environment Creation Device - Google Patents

Description

The present invention relates to an environment creating device.

As disclosed in the following Patent Document 1, an environment forming device is known that adjusts the temperature of air in a room to be air-conditioned to a predetermined temperature and maintains that temperature for a predetermined period of time. In the environment forming device, an air conditioner such as a heater and a fan are placed in an air-conditioned room, and the conditioned air is circulated between the air-conditioned room and the room to be air-conditioned, such as a test room, by operating the fan. In this way, the temperature of the air in the room to be air-conditioned is adjusted to the set temperature.

Japanese Patent Application Publication No. 4-324089

In the environment forming device, the fan is operated at a predetermined rotation speed to circulate air between the air-conditioned rooms. The fan is usually set at a rotation speed that stabilizes the room temperature at the set temperature when no samples are placed in the air-conditioned room. On the other hand, during an actual test in which samples are placed in the air-conditioned room, the temperature in the air-conditioned room may be affected by the sample placement (e.g., sample position, type, and number), so it may be better to configure the fan rotation speed to be adjustable. However, the extent to which the fan rotation speed should be adjusted varies depending on the sample placement, so it is difficult to set an optimal rotation speed in advance. Also, the sample placement may affect the temperature distribution in the air-conditioned room.

The present invention was made in consideration of the above-mentioned conventional technology, and its purpose is to make it possible to operate the fan at a rotation speed that corresponds to the arrangement of the sample.

To achieve the above object, the environmental forming device according to the present invention comprises a fan arranged to blow air whose temperature has been adjusted by an air conditioner into a room to be air-conditioned, a first temperature sensor for detecting the temperature of the air blown out from the fan, a second temperature sensor arranged in the room to be air-conditioned downstream of the first temperature sensor in the air flow direction, and a controller for controlling the fan. The controller is configured to determine whether a predetermined stable state has been reached while referring to the temperatures detected by the first temperature sensor and the second temperature sensor, and after the predetermined stable state has been reached, if the detected temperature of at least one of the first temperature sensor and the second temperature sensor is outside a predetermined range, to increase the rotation speed of the fan while checking whether the detected temperatures of both temperature sensors are within the predetermined range.

The environmental forming device according to the present invention includes a fan arranged to blow air whose temperature has been adjusted by an air conditioner into a room to be air-conditioned, a first temperature sensor that detects the temperature of the air discharged from the room to be air-conditioned, a second temperature sensor arranged in the room to be air-conditioned upstream of the first temperature sensor in the air flow direction, and a controller that controls the fan, and the controller is configured to determine whether a predetermined stable state has been reached while referring to at least one of the temperatures detected by the first temperature sensor and the second temperature sensor, and after the predetermined stable state has been reached, if the temperature detected by at least one of the first temperature sensor and the second temperature sensor is outside a predetermined range, to increase the rotation speed of the fan while checking whether the temperatures detected by both temperature sensors are within the predetermined range.

In these inventions, the controller judges whether a predetermined stable state has been reached while referring to at least one of the detected temperatures of the first and second temperature sensors. That is, it judges whether at least one of the detected temperatures of the first and second temperature sensors is in a stable state where it is settled within a predetermined temperature range. Then, in this stable state, the controller judges whether at least one of the detected temperatures of the first and second temperature sensors is outside the predetermined range. That is, in a stable state, it is desirable that the detected temperatures of the first and second temperature sensors are within the predetermined range, but depending on the arrangement of the samples in the air-conditioned room (e.g., position, type, or number), at least one of the detected temperatures may be outside the predetermined range even in a stable state. Therefore, it is confirmed whether the detected temperatures of both temperature sensors are within the predetermined range, and if at least one of the detected temperatures is outside the predetermined range, the controller controls to increase the rotation speed of the fan while checking whether the detected temperatures of both temperature sensors are within the predetermined temperature range. This increases the circulation flow rate in the air-conditioned room, thereby suppressing the occurrence of air temperature distribution in the air-conditioned room. Furthermore, when controlling the fan speed, the fan speed is increased while checking whether the temperatures detected by both temperature sensors are within a specified temperature range, which prevents the fan speed from being increased too much and makes it possible to control the speed according to the placement of the samples in the air-conditioned room.

The controller may be configured to further increase the fan speed by a predetermined number of revolutions if the fan speed is outside the predetermined range even after the fan speed is increased by the predetermined number of revolutions.

In this embodiment, while checking whether the temperatures detected by both temperature sensors are within the predetermined range, the fan speed is increased by a predetermined number of revolutions so that the temperatures detected by both temperature sensors are within the predetermined range. In other words, while increasing the fan speed by a predetermined number of revolutions, it is possible to set the fan speed according to the arrangement of the samples placed in the air-conditioned room. Moreover, it is possible to more reliably prevent the fan speed from increasing too much.

When the controller performs control to increase the rotation speed of the fan, the controller may store the rotation speed after the rotation speed is increased. In this case, the controller may set the rotation speed of the fan to the stored rotation speed the next time the fan is operated under the same conditions.

In this manner, the next time the device is operated under the same conditions, the recorded fan speed is used, eliminating the need to adjust the fan speed.

After controlling the fan to increase its rotation speed, if the temperatures detected by both temperature sensors are within the predetermined range, the controller may store the increased rotation speed. In this case, the controller may set the fan's rotation speed to the stored rotation speed the next time the fan is operated under the same conditions.

In this manner, the next time the device is operated under the same conditions, the recorded fan speed is used, eliminating the need to adjust the fan speed.

The controller may be configured to reduce the fan speed by a predetermined number of revolutions if the predetermined stable state is not reached after a predetermined time has elapsed.

In this configuration, the fan rotation speed is reduced, reducing the impact of heat generated by the fan motor.

As explained above, according to the present invention, the fan can be operated at a rotation speed that corresponds to the sample placement situation.

1 is a diagram illustrating a schematic configuration of an environment forming device according to an embodiment. 3 is a diagram for explaining a functional configuration of a controller of the environment creating device. FIG. FIG. 13 is a diagram for explaining a control flow during operation at a low temperature. FIG. 13 is a diagram showing a time chart when a low temperature and a high temperature are set as the set temperature. FIG. 13 is a diagram illustrating a schematic configuration of an environment forming device according to another embodiment. 13 is a diagram for explaining a control flow when the environment forming device according to the embodiment or the modified example of the other embodiment is operated at a low temperature. FIG.

The following describes in detail the embodiment of the present invention with reference to the drawings.

As shown in FIG. 1, the environment forming device 10 according to this embodiment is a device that adjusts the temperature of the air in the air-conditioned room 12 while circulating conditioned air between the air-conditioned room 12 and the air-conditioned room 14, and is configured as an environmental testing device such as a thermostatic chamber or a thermo-hygrostatic chamber. Note that the environment forming device 10 is not limited to an environmental testing device, and may be configured as a heat treatment device, an oven, etc.

The environment forming device 10 has a device body 16 made of insulating panels, and inside this device body 16, an air-conditioned room 12 and an air-conditioned room 14 are separated by a partition wall 18. The air-conditioned room 12 is a room for exposing a sample to a predetermined temperature environment and applying a predetermined temperature load to the sample, and in the case of an environmental testing device, is also called a test room. The air-conditioned room 14 is a room for generating temperature-adjusted air.

The partition wall 18 is provided with a plurality of communication holes, one of which functions as an outlet hole 21 for blowing out conditioned air to the air-conditioned room 12, and the other functions as an intake hole 22 for drawing air from the air-conditioned room 12 into the air-conditioned room 14. Note that, in FIG. 1, the outlet hole 21 is formed in the center of the partition wall 18, and the intake holes 22 are formed at the top and bottom of the figure, but this configuration is not limited to this. For example, the outlet hole 21 may be formed in the center of the partition wall 18, and the intake holes 22 may be formed at both the left and right ends, or the outlet hole 21 may be located at the upper end of the partition wall 18, and the intake hole 22 may be located at the lower end of the partition wall 18. In short, it is sufficient that the air is located in a position suitable for circulating between the air-conditioned room 12 and the air-conditioned room 14 by the action of the fan 29 described later.

An air conditioner 24 for adjusting the temperature of the air is arranged in the air-conditioned room 14. The air conditioner 24 includes a heater 25, a cooler 26, and a humidifier 27. The heater 25 is configured to heat the air, the cooler 26 is configured to cool the air, and the humidifier 27 is configured to humidify the air. Note that the configuration of the air conditioner 24 is not limited to this. For example, the humidifier 27 may be omitted.

The air outlet 21 is provided with a fan 29 for generating an airflow in the air-conditioned room 12. The fan 29 is not limited to being positioned inside the air outlet 21, and may be positioned inside the air-conditioned room 14. In short, the fan 29 may be positioned in any way as long as the conditioned air is blown out through the air outlet 21 into the air-conditioned room 12.

The environment forming device 10 is provided with a first temperature sensor 31, a second temperature sensor 32, and a controller 34. Both the first temperature sensor 31 and the second temperature sensor 32 are arranged in the air-conditioned room 12 and detect the temperature of the air in the air-conditioned room 12. However, the second temperature sensor 32 is arranged downstream of the first temperature sensor 31 in the air flow direction. That is, the second temperature sensor 32 is arranged at a position farther away from the blow-out hole 21 than the first temperature sensor 31, or at a position closer to the intake hole 22 than the first temperature sensor 31 when viewed in the direction along the air flow direction. For example, the first temperature sensor 31 is arranged near the blow-out hole 21 in the air-conditioned room 12, and the second temperature sensor 32 is arranged near the door body 36 facing the partition wall 18 in the air-conditioned room 12. That is, the second temperature sensor 32 is located downstream or on the door body 36 side in the air flow direction from the center of the air-conditioned room 12. The door 36 is provided on the device body 16 to open and close the sample removal port formed in the air-conditioned room 12.

The first temperature sensor 31 does not necessarily have to be located in the air-conditioned room 12 as long as it can detect the temperature of the air blown out from the fan 29. The first temperature sensor 31 may be located in the air-conditioned room 12, or in the air-conditioned room 14, as long as it is located near the air outlet 21.

The second temperature sensor 32 may be composed of one sensor or may be composed of multiple sensors. For example, if the second temperature sensor 32 is composed of two sensors, each sensor may be disposed at the left and right ends of the outlet, or at the top and bottom ends of the outlet.

The first temperature sensor 31 and the second temperature sensor 32 output signals indicating the detected temperatures. The signals output from the first temperature sensor 31 and the second temperature sensor 32 are input to the controller 34. The controller 34 is configured by a computer including a CPU, a memory device, etc., and by executing a stored program, the controller 34 functions as a stability determination unit 34a, a timer unit 34b, a temperature determination unit 34c, a fan control unit 34d, and a rotation speed memory unit 34e, as shown in FIG. 2.

The stability determination unit 34a is a functional unit for determining whether the temperature of the air in the air-conditioned room 12 is in a predetermined stable state, and refers to at least one of the detected temperature tc1 of the first temperature sensor 31 and the detected temperature tc2 of the second temperature sensor 32, and determines whether the temperature of the air in the air-conditioned room 12 (representative temperature) based on at least one of these detected temperatures tc1 and tc2 has remained within a predetermined temperature range for a predetermined period of time. For example, the stability determination unit 34a determines that the temperature is in a predetermined stable state when the detected temperature tc1 of the first temperature sensor 31 as the representative temperature has remained within a predetermined temperature range (for example, within a range of plus or minus 2°C of the set temperature) for a predetermined period of time. The predetermined period of time is, for example, a few minutes. The stability determination unit 34a may determine that the temperature is in a predetermined stable state when the detected temperature tc2 of the second temperature sensor 32 as the representative temperature has remained within a predetermined temperature range for a predetermined period of time.

The representative temperature may be an average value of the detected temperature tc1 of the first temperature sensor 31 and the detected temperature tc2 of the second temperature sensor 32. In this case, the stability determination unit 34a may determine that the temperature is in a predetermined stable state when the representative temperature, which is the average value, is within a predetermined temperature range for a predetermined time. The average value of the detected temperature tc1 of the first temperature sensor 31 and the detected temperature tc2 of the second temperature sensor 32 may be a simple average value of both, or a weighted average value in which either the first temperature sensor 31 or the second temperature sensor 32 is weighted. In addition, when the second temperature sensor 32 is composed of, for example, two sensors, the average value of the two sensors may be the detected temperature tc2 of the second temperature sensor 32. Alternatively, the detected temperature tc2 may be a simple average value of the values of one of the first temperature sensor 31 and the second temperature sensor 32 and the other of the second temperature sensor 32 (i.e., three values).

The timer 34b is configured to measure the time during which a state in which a predetermined stable state has not been reached continues. In other words, the timer 34b starts timing when the air conditioner 24 starts operating so that the air temperature in the air-conditioned room 12 reaches the set temperature, and continues to measure the time until the predetermined stable state is reached. The timer 34b then outputs a count-up signal after timing the predetermined period of time.

The temperature determination unit 34c is configured to determine whether the detected temperature tc1 of the first temperature sensor 31 is within a predetermined temperature range (e.g., a range of plus or minus 2°C of the set temperature) and whether the detected temperature tc2 of the second temperature sensor 32 is within a predetermined temperature range (e.g., a range of plus or minus 2°C of the set temperature). In other words, the temperature determination unit 34c determines whether there is any variation in the temperature of the air in the air-conditioned room 12.

The fan control unit 34d is configured to operate the fan 29 at a predetermined rotation speed (a reference rotation speed or a rotation speed stored in the rotation speed memory unit 34e). The fan control unit 34d is also configured to increase the rotation speed of the fan 29 by a predetermined rotation speed according to the temperature determination result by the temperature determination unit 34c. The fan control unit 34d is also configured to decrease the rotation speed of the fan 29 by a predetermined rotation speed upon receiving a count-up signal output from the timer unit 34b. The fan control unit 34d may be configured not to decrease the rotation speed of the fan 29 to a rotation speed that places a load on the refrigerator that constitutes the cooler 26.

The rotation speed memory unit 34e is configured to store the changed rotation speed when the rotation speed of the fan 29 is increased or decreased by a predetermined rotation speed. The rotation speed stored in the rotation speed memory unit 34e may be erased from the controller 34 when the test is completed.

Here, the operation of the environment forming device 10 according to this embodiment will be described with reference to Figs. 3 and 4. Fig. 4 shows an example of a time chart when the low temperature TL and the high temperature TH are set as the set temperatures, and Fig. 3 shows an example of a control flow during operation at the low temperature TL.

When operating the environment forming device 10, first, a sample is placed in the air-conditioned room 12, and the set temperature and test time are input to the controller 34. There may be one sample, or two or more samples. The set temperature is the target temperature of the air in the air-conditioned room 12, and the test time is the duration during which the air-conditioned room 12 is maintained at the set temperature. Note that, for example, as shown in FIG. 4, two conditions of a low temperature TL and a high temperature TH may be set as the set temperature, and in this case, the number of repetitions may be set. If the humidity is also set, the set humidity is also input.

As shown in FIG. 3, when a command to start the operation of the environment forming device 10 is input to the controller 34 (step ST10), the controller 34 operates the air conditioner 24 (step ST11). That is, the heater 25, cooler 26, and humidifier 27 operate at a predetermined capacity according to the input set temperature and set humidity, but when the low temperature TL in FIG. 4 is set as the set temperature, for example, only the cooler 26 may be operated, or the cooler 26 and heater 25 may be operated. Note that when humidity control is not performed, the set humidity is not input.

The controller 34 then operates the fan 29, and at this time checks whether the changed fan rotation speed described below is stored in the rotation speed memory unit 34e (step ST12). If it is immediately after the start of operation, the changed fan rotation speed is not stored in the rotation speed memory unit 34e, and in this case the fan 29 is rotated at the reference rotation speed RS that was stored from the beginning (step ST13). As a result, air whose temperature has been adjusted by the air conditioner 24 is blown out from the air-conditioned room 14 to the air-conditioned room 12 through the blowing holes 21 in the partition wall 18. Then, air circulates between the air-conditioned room 14 and the air-conditioned room 12, and the temperature of the air in the air-conditioned room 12 gradually approaches the set temperature (low temperature TL).

The controller 34 (stability determination unit 34a) then determines whether the temperature of the air in the air-conditioned room 12 is in a predetermined stable state (step ST14). That is, based on the temperature detected by at least one of the first temperature sensor 31 and the second temperature sensor 32, it determines whether the temperature of the air in the air-conditioned room 12 has remained within a predetermined range of the set temperature (low temperature TL) for a predetermined period of time. Then, if it is determined that the air-conditioned room 12 is in a predetermined stable state, the process proceeds to step ST15.

In step ST15, the controller 34 (temperature determination unit 34c) determines whether the detected temperature tc1 of the first temperature sensor 31 is within a predetermined temperature range and whether the detected temperature tc2 of the second temperature sensor 32 is within a predetermined temperature range. In other words, assuming that the predetermined stable state is in place, the controller 34 monitors whether the detected temperatures tc1, tc2 of the first temperature sensor 31 and the second temperature sensor 32 are within the predetermined range. If the detected temperature tc1 of the first temperature sensor 31 and the detected temperature tc2 of the second temperature sensor 32 are both within the predetermined range, the controller 34 (fan control unit 34d) maintains the rotation speed of the fan 29 at the reference rotation speed RS (step ST16).

Then, after the temperature of the air-conditioned room 12 reaches the set temperature (low temperature TL), it is determined whether the set test time has elapsed (step ST17), and steps ST14 to ST17 are repeated until the set test time has elapsed.

On the other hand, after entering the predetermined stable state, if either the detected temperature tc1 of the first temperature sensor 31 or the detected temperature tc2 of the second temperature sensor 32 is outside the predetermined temperature range (NO in step ST15), the controller 34 (fan control unit 34d) increases the rotation speed of the fan 29 by a predetermined number of rotations from the reference rotation speed RS to the first rotation speed R1 (step ST18). At this time, the controller 34 (rotation speed memory unit 34e) stores the first rotation speed R1, which is the changed rotation speed (step ST19).

When the rotation speed of the fan 29 has been increased by the predetermined number of rotations, the process returns to step ST14, and again in step ST15, the controller 34 (temperature determination unit 34c) determines whether the detected temperature tc1 of the first temperature sensor 31 is within the predetermined temperature range and the detected temperature tc2 of the second temperature sensor 32 is within the predetermined temperature range. The rotation speed of the fan 29 is increased by the predetermined number of rotations until the determination is YES. At this time, each time the rotation speed of the fan 29 is increased, the changed rotation speed is stored (step ST19). Note that FIG. 4 shows an example in which the rotation speed of the fan 29 is increased twice, that is, the fan 29 operates at the second rotation speed R2, which is increased by a predetermined number of rotations from the first rotation speed R1.

Then, when the detected temperatures tc1 and tc2 are within the respective predetermined temperature ranges, the rotation speed is maintained at that value (step ST16). That is, when either the detected temperature tc1 or the detected temperature tc2 is outside the predetermined temperature range, the rotation speed of the fan 29 is increased while checking whether the detected temperatures tc1 and tc2 of both temperature sensors are within the predetermined temperature range. In this embodiment, after the rotation speed of the fan 29 is increased by a predetermined rotation speed in step ST18, the controller 34 (temperature determination unit 34c) determines whether the detected temperatures tc1 and tc2 are within the predetermined temperature range in step ST15, but this control method is not limited to this. Instead of this control, or in addition to this control, while the rotation speed of the fan 29 is being increased by a predetermined rotation speed in step ST18, it may be determined whether the detected temperatures tc1 and tc2 are within the respective predetermined temperature ranges. This determination may be made constantly while the rotation speed of the fan 29 is being increased, or may be made only temporarily while the rotation speed of the fan 29 is being increased. When the detected temperatures tc1 and tc2 are monitored while the rotation speed of the fan 29 is being increased, if the detected temperatures tc1 and tc2 each fall within a predetermined temperature range, the increase in the rotation speed of the fan 29 is stopped at that point. Then, in step ST19, the rotation speed of the fan 29 at the time of this stop is stored in the controller 34 (rotation speed storage unit 34e).

After the air conditioner 24 and the fan 29 are operated, the set temperature (low temperature TL) may not be reached and the specified stable state may not be reached (NO in step ST14). For example, if a heat-generating sample is placed in the air-conditioned room 12, the set temperature may not be reached. For this reason, the controller 34 (timer 34b) starts timing from the time the air conditioner 24 starts operating so that the air temperature in the air-conditioned room 12 reaches the set temperature, and continues measuring time. Then, when a specified measurement time has elapsed (counts up) (YES in step ST20), the rotation speed of the fan 29 is reduced by a specified number of rotations from the reference rotation speed RS (step ST21), and the changed rotation speed is stored in the controller 34 (rotation speed memory 34e) (step ST22). By reducing the rotation speed of the fan 29, the heat generated by the fan 29 is reduced, making it easier for the temperature in the air-conditioned room 12 to fall. Steps ST20 to ST22 are repeated until a specified stable state is reached. Then, when a predetermined stable state is reached, steps ST14 to ST17 are executed. Note that if control is performed to reduce the rotation speed of fan 29, adjustment to the rotation speed before reduction may be prohibited under the same temperature conditions from the next time onwards.

When the set test time has elapsed since the temperature in the air-conditioned room 12 reached the set temperature (low temperature TL) (YES in step ST17), the next test, i.e., a high temperature test at the high temperature TH, is started.

In the high-temperature test, steps ST11 to ST23 are performed in the same manner as in the low-temperature test. However, because the high-temperature temperature TH is used as the set temperature, the determination in step ST12 is NO. In other words, since this is the first high-temperature test, the rotation speed of the fan 29 for the high-temperature test has not yet been stored in the controller 34 (rotation speed storage unit 34e), so the fan 29 operates at the reference rotation speed RS. Note that the example in FIG. 4 illustrates a case in which the rotation speed of the fan 29 is increased once in the high-temperature test, and the operation of the fan 29 continues at the first rotation speed R1.

Then, when the high-temperature test is performed for the set test time, the low-temperature test is performed again. At this time, since it is the second low-temperature test and a test under the same temperature conditions has already been performed, the rotation speed of the fan 29 (second rotation speed R2) is stored in the controller 34 (rotation speed memory unit 34e). Therefore, the process moves from step ST12 to step ST24, and the fan 29 operates at the stored rotation speed (second rotation speed R2). Therefore, the judgments of steps ST14 and ST15 are likely to be YES. When the low-temperature test and the high-temperature test are repeated a predetermined number of times and the test is completed, the fan rotation speed stored in the controller 34 (rotation speed memory unit 34e) may be erased. In this case, the judgment of step ST12 is NO immediately after the start of operation during the next test, so the fan 29 is rotated at the reference rotation speed RS stored from the beginning (step ST13).

As described above, in this embodiment, the controller 34 judges whether a predetermined stable state has been reached while referring to the detected temperatures of the first temperature sensor 31 and the second temperature sensor 32. That is, it judges whether the detected temperatures tc1, tc2 of at least one of the first temperature sensor 31 and the second temperature sensor 32 are stable within a predetermined temperature range. Then, in this stable state, the controller 34 judges whether the detected temperatures tc1, tc2 of at least one of the first temperature sensor 31 and the second temperature sensor 32 are outside the predetermined range. That is, in a stable state, it is desirable that the detected temperatures tc1, tc2 of the first temperature sensor 31 and the second temperature sensor 32 are within the predetermined range, but depending on the arrangement of the samples in the air-conditioned room 12 (e.g., position, type, or number), at least one of the detected temperatures tc1, tc2 may be outside the predetermined range even in a stable state. Therefore, the controller 34 checks whether the detected temperatures tc1 and tc2 are within a predetermined range, and if at least one of the detected temperatures tc1 and tc2 is outside the predetermined range, the controller 34 controls the fan 29 to increase its rotation speed while checking whether the detected temperatures tc1 and tc2 of both temperature sensors are within the predetermined temperature range. This increases the circulating flow rate of air in the air-conditioned room 12, thereby suppressing the occurrence of air temperature distribution in the air-conditioned room 12. Moreover, when controlling to increase the rotation speed of the fan 29, the controller 34 increases the rotation speed of the fan 29 while checking whether the detected temperatures tc1 and tc2 of both temperature sensors are within the predetermined temperature range, so that the rotation speed of the fan 29 is prevented from being increased too much, and it is possible to control the rotation speed according to the arrangement of the sample in the air-conditioned room 12.

In addition, in this embodiment, when control is performed to increase the rotation speed of the fan 29, the rotation speed after the increase is recorded, and the next time the device is operated under the same conditions, the rotation speed of the fan 29 is set to the stored rotation speed. Therefore, it is possible to omit adjustment of the rotation speed of the fan 29 from the next operation onwards.

In addition, in this embodiment, if a stable state is not reached after a predetermined time has elapsed, the rotation speed of the fan 29 is reduced by a predetermined number of rotations, thereby reducing the effects of heat generation by the fan motor and making it easier to reach a stable state.

Note that the embodiment disclosed this time should be considered to be illustrative and not restrictive in all respects. The present invention is not limited to the above embodiment, and various modifications and improvements are possible within the scope of the present invention. For example, in the above embodiment, the second temperature sensor 32 is arranged downstream of the first temperature sensor 31 in the air flow direction, but this is not limited. As shown in FIG. 5, the second temperature sensor 32 may be arranged upstream of the first temperature sensor 31 in the air flow direction. In this case, however, the first temperature sensor 31 is arranged to detect the temperature of the air discharged from the air-conditioned room 12, rather than detecting the temperature of the air blown out from the fan 29. In other words, the first temperature sensor 31 may be arranged in the air-conditioned room 12, or in the air-conditioned room 14, as long as it is arranged near the suction hole 22. The second temperature sensor 32 is arranged in the same position as in the embodiment of FIG. 1. Even in this case, the same control operation as that shown in FIG. 3 is performed.

In the above-mentioned embodiment (the embodiment shown in FIG. 1 and the embodiment shown in FIG. 5), the rotation speed of the fan 29 after the change is stored in the controller 34 (rotation speed storage unit 34e) each time the rotation speed of the fan 29 is increased by a predetermined rotation speed, but this is not limited to this. For example, as shown in FIG. 6, instead of storing the rotation speed of the fan 29 every time it is increased, the final set rotation speed may be stored. Specifically, step ST19 for storing the changed fan rotation speed, which is immediately after step ST18 for increasing the rotation speed of the fan 29, may be omitted, while step ST31 for storing the rotation speed of the fan 29 may be provided after step ST16 for maintaining the rotation speed of the fan 29. Note that step ST31 may be executed when the determination in step ST17 is YES. Even in this case, the stored rotation speed can be used in the next and subsequent tests under the same temperature conditions.

In the above-described embodiment (the embodiment shown in FIG. 1 and the embodiment shown in FIG. 5), when the rotation speed of the fan 29 is changed, the changed rotation speed is stored and used for the next test under the same temperature conditions. However, this is not limited to the above configuration, and even when the rotation speed of the fan 29 is changed, the changed fan rotation speed may not be stored. In this case, when the same temperature conditions are next tested, the rotation speed of the fan 29 will be controlled to gradually increase when in a stable state, as shown in FIG. 3.

In the above-described embodiment (the embodiment shown in FIG. 1 and the embodiment shown in FIG. 5), when the stable state is not reached, the rotation speed of the fan 29 is controlled to be reduced by counting up the timer unit 34b, but this control may be omitted. In other words, when the stable state is not reached, the stable state may be reached by controlling to change the capacity of the air conditioner 24.

10: environment forming device 12: air-conditioned room 14: air-conditioned room 24: air conditioner 29: fan 31: first temperature sensor 32: second temperature sensor 34: controller tc1: detected temperature tc2: detected temperature

Claims (6)

A fan arranged to blow air whose temperature has been adjusted by the air conditioner into a room to be air-conditioned;
a first temperature sensor for detecting a temperature of the air blown out from the fan;
A second temperature sensor arranged downstream of the first temperature sensor in an air flow direction in the air-conditioned room;
A controller for controlling the fan,
The controller is configured to determine whether a predetermined stable state has been reached while referring to at least one of the detected temperatures of the first temperature sensor and the second temperature sensor, and after the predetermined stable state has been reached, if the detected temperature of at least one of the first temperature sensor and the second temperature sensor is outside a predetermined range, to increase the rotation speed of the fan while checking whether the detected temperatures of both temperature sensors are within the predetermined range. A fan arranged to blow air whose temperature has been adjusted by the air conditioner into a room to be air-conditioned;
A first temperature sensor that detects the temperature of air discharged from the air-conditioned room;
A second temperature sensor arranged upstream of the first temperature sensor in an air flow direction in the air-conditioned room;
A controller for controlling the fan,
The controller is configured to determine whether a predetermined stable state has been reached while referring to at least one of the detected temperatures of the first temperature sensor and the second temperature sensor, and after the predetermined stable state has been reached, if the detected temperature of at least one of the first temperature sensor and the second temperature sensor is outside a predetermined range, to increase the rotation speed of the fan while checking whether the detected temperatures of both temperature sensors are within the predetermined range. The environment forming device according to claim 1 or 2, wherein the controller further increases the rotation speed by a predetermined number of revolutions if the rotation speed of the fan is outside the predetermined range even after the rotation speed is increased by the predetermined number of revolutions. When the controller performs control to increase the rotation speed of the fan, the controller stores the rotation speed after the rotation speed is increased,
4. The environment creating device according to claim 1, wherein the controller sets the rotation speed of the fan to the stored rotation speed the next time the device is operated under the same conditions. the controller, after performing control to increase the rotation speed of the fan, stores the increased rotation speed when the temperatures detected by the two temperature sensors are within the predetermined range;
4. The environment creating device according to claim 1, wherein the controller sets the rotation speed of the fan to the stored rotation speed the next time the device is operated under the same conditions. The environment forming device according to any one of claims 1 to 5, wherein the controller reduces the rotation speed of the fan by a predetermined number of rotations if the predetermined stable state is not reached even after a predetermined time has elapsed.

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